Malicious PDF — malware analysis report

Static analysis result for SHA-256 18acc7a0129b8971…

MALICIOUS

PDF

77.7 KB Created: 2021-11-09 14:58:02 +02:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 5.11.3) First seen: 2026-05-09
MD5: 8938a54e84988d645582ead28a7712f9 SHA-1: 4021f51b39ffdc93a5e4cd1da15b195eba6805c9 SHA-256: 18acc7a0129b8971211c2ef9e222f6eba510a63bcd80bf58b32e9b93b8068f6f
186 Risk Score

Machine Learning

  • Nyx PDF Classifier malicious score 0.9989

Heuristics 6

  • ClamAV: Pdf.Phishing.Trojan-d2568dad23a94d95-d2568dad23a94d95-10044375-0 critical CLAMAV_DETECTION
    ClamAV detected this file as malware: Pdf.Phishing.Trojan-d2568dad23a94d95-d2568dad23a94d95-10044375-0
  • Travel-support phone-number stuffing scam critical SE_TRAVEL_SUPPORT_PHONE_SCAM
    Document repeats phone numbers in airline/travel/refund/support language, often across multiple regional phrasings. This matches SEO/support-scam PDFs that impersonate airlines or travel brands and route users to attacker-controlled call centers rather than a normal travel document.
  • Small PDF is a non-clustered link farm on disposable hosting medium PDF_SEO_DISPOSABLE_LINK_FARM
    Small PDF contains many clickable external PDF links spread thin across many distinct hosts (no single dominant host), corroborated by a utm_term SEO-redirector link and/or links parked on free/disposable content hosts. This is the 'free document/template' SEO phishing PDF family, which ranks for search queries and routes users into payload/redirect chains, rather than a normal document citation pattern. The PDF itself carries no exploit — the risk is the linked destinations.
  • External URI info PDF_URI
    PDF contains an external URL action
  • Object number defined twice with different bodies info PDF_DUPLICATE_OBJ_BODY_INCREMENTAL
    The same indirect object (N G) is defined more than once with different body bytes. First-wins and last-wins readers will resolve different content, which is a parser-confusion shape used by targeted PDFs. Body-only differences are common in benign incremental updates, so severity is raised only when the duplicate carries active content.
  • Embedded URL info EMBEDDED_URL
    One or more URLs were extracted from the document. The URL itself is not a detection — see the per-URL labels for which channel (macro, JS, link annotation, document body, ...) reached each URL.
    URL https://linhan.xelinhan.vn/userfiles/file/94915716510.pdf In PDF document text
    • http://bestforfishing.com/wp-content/plugins/super-forms/uploads/php/files/0d27ab0cabca54228e68764d8180eada/71607555297.pdfIn PDF document text
    • https://eliska.grenoo.sk/uploads/file/43221436893.pdfIn PDF document text
    • http://gpp300.fr/userfiles/file/babidixujemositi.pdfIn PDF document text
    • http://snieznik.pl/userfiles/file/53049446809.pdfIn PDF document text
    • http://cermak-expo.cz/data/files/file/kodexabavojenerokesumoz.pdfIn PDF document text
    • http://cpils.com/userfiles/file/lozux.pdfIn PDF document text
    • https://ckfinder.pamlskovnik.cz/ckfinder/userfiles/files/jexopu.pdfIn PDF document text
    • https://christianklein.eu/Quansis/ckfinder/userfiles/files/wazenuxiku.pdfIn PDF document text
    • https://barcelonacentromedico.es/files/galeria/files/79046695391.pdfIn PDF document text
    • https://cuichi177.com/uploads/files/202109011345235261.pdfIn PDF document text
    • http://seednseed.com/admin/fckfiles/file/vasoledizow.pdfIn PDF document text
    • https://www.eecpowerindia.com/codelibrary/ckeditor/ckfinder/userfiles/files/39431208755.pdfIn PDF document text
    • https://markmont.eu/editor_uploads/system/files/63954105073.pdfIn PDF document text
    • http://www.ashtralmedia.com/wp-content/plugins/formcraft/file-upload/server/content/files/1615da87043d85---zozedutidifixowaki.pdfIn PDF document text
    • https://envida-nieuws.nl/bsb_website/upload_fck/file/37988723336.pdfIn PDF document text
    • https://abisspaandboutique.com/nbloom/fckuploads/file/parebugizago.pdfIn PDF document text
    • http://feg.vn/uploads/files/wasevufesobifotej.pdfIn PDF document text
    • http://dichvutheapec.com/upload/FCK/file/79301484903.pdfIn PDF document text
    • http://bsa-billiard.by/images_from_html_editor/file/76782666733.pdfIn PDF document text
    • http://feedproxy.google.com/~r/Xvkpad/~3/oscUj7J0Gjw/uplcv?utm_term=guardianship+law+firmPDF link annotation
    • http://www.w3.org/1999/02/22-rdf-syntax-ns#In PDF document text
    • http://purl.org/dc/elements/1.1/In PDF document text
    • http://ns.adobe.com/pdf/1.3/In PDF document text
    • http://ns.adobe.com/xap/1.0/In PDF document text
    • http://ns.adobe.com/xap/1.0/mm/In PDF document text
    • http://ns.adobe.com/xap/1.0/rights/In PDF document text
    • http://dejavu.sourceforge.netIn extracted file (font_00_sfnt_off0000ca9a.bin)
    • http://dejavu.sourceforge.net/wiki/index.php/LicenseIn extracted file (font_00_sfnt_off0000ca9a.bin)

Extracted artifacts 3

Files carved from inside the sample during analysis.

FilenameKindSourceSize
font_00_sfnt_off0000ca9a.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xCA9A 16540 bytes
SHA-256: 45015263e28dbf00792e0fa83ae0fb9123af5110209f191c00797c49350166ef
font_01_sfnt_off0000e1bb.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xE1BB 18216 bytes
SHA-256: 6ca6755fe5e7455d41a91f991336bd568782386b4befbbda5115f52c6c9f6000
font_02_sfnt_off00011168.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x11168 10640 bytes
SHA-256: 8b1d18bb2c52506a6402654afb6b45819c1dfc37340856bf6490ea7d1998e6b2